Question

At summer camp the ratio of boys to girls was 10 : 1. If there were 30 boys, how manygirls were there?

Answer 1

The ratio of boys to girls was 10.

Boys:Girls = 10:1

If there were 30 boys then let x be the number of girls.

`\frac{\text{Boys}}{\text{Girls}}=(10)/(1)=(30)/(x)`

Let us solve for x.

`\begin{gathered} (10)/(1)=(30)/(x) \\ 10\cdot x=30\cdot1 \\ 10x=30 \\ x=(30)/(10) \\ x=3 \end{gathered}`

So, there were 3 girls.